Method for estimating remaining time and capacity of battery

Abstract

The invention discloses a method for estimating the remaining time of a battery, which comprises the following steps: S1, reading a reference curve of the battery, wherein the reference curve is initially generated according to the nominal capacity of the battery; S2, acquiring current battery parameters, wherein the parameters include the current voltage, the current electric current, and the discharge time; S3, judging whether the battery is in a floating, discharge or equalized charging state; S4, calculating the remaining time T of the battery in the state of floating; S5, calculating the remaining time of the battery in the state of discharge; and S6, calculating the discharge time of the battery in the state of equalized charging. The invention also discloses a method for estimating the remaining capacity of a battery. According to invention, a remaining time estimation result and a remaining capacity estimation result are coherent, and the accuracy is higher, so that while the availability is ensured, the user experience is greatly increased.

Description

technical field [0001] The invention relates to the field of battery charging and discharging, and more specifically, relates to a method for estimating the remaining time and capacity of the battery. Background technique [0002] For a long time, the accurate estimation of the battery capacity in the communication power supply system is a function that users urgently need to solve, but the estimation of the remaining battery time in the prior art has the following problems: [0003] For the estimation of the remaining time: the load remains unchanged, and the estimated result of the remaining time is inconsistent, such as: 200-170-150-100-80 (minutes), or the load remains unchanged, and the estimated result of the remaining time jumps sharply, such as: 200-170 150-170-150-100-80-70-50-1500-200 (minutes); or when the load changes greatly, the estimated value of the remaining time cannot change accordingly, such as: the load drops from 30A to 10A, the time remaining estimate...

AI Technical Summary

Problems solved by technology

[0004] Estimation of the remaining capacity: the load remains unchanged, and the estimated result of the remaining capacity is inconsistent, such as: 120-100-90-80-75-60-50 (AH); the load remains unchanged, and the estimated result of the remaining capacity jumps sharply , such as: 120-100-90-100-90-80-75 (AH); when the load changes greatly, the estimated value of remaining capacity jumps, such as: the load drops from 30A to 10A, the estimated value of remaining capacity It will increase, which is unreasonable;

[0005] Moreover, there are still the following situations: the remaining time and the remaining capacity estimation results cannot be synchronized, resulting in contradictory results, such as: the current remaining capacity is 20AH, and the remaining time is 0; only the remaining capacity or the percentage of remaining capacity can be estimated, and the battery life cannot be predicted. Duration; when the battery is discharged in an unsaturated state, the remaining time and remaining capacity estimation results are very inaccurate, and the battery changes from discharging to equal charging, or during the equal charging process, the remaining time and remaining capacity cannot increase reasonably

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